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118 Peitho
Classification: Main-belt Asteroid          SPK-ID: 2000118
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1631928568620973 4.058e-08  
a 2.437685709882578 6.3491e-09 AU
q 2.039872814754931 9.9568e-08 AU
i 7.742096068615927 5.6605e-06 deg
node 47.71077690518171 3.8434e-05 deg
peri 33.27516226113431 4.2078e-05 deg
M 255.8712330873832 1.7208e-05 deg
tp 2457402.599209004892
(2016-Jan-15.09920901)
6.6855e-05 JED
period 1390.160659092772
3.81
5.4311e-06
1.487e-08
d
yr
n .2589628742874499 1.0117e-09 deg/d
Q 2.835498605010226 7.3852e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1006  
   data-arc span      52000 days (142.37 yr)  
   first obs. used      1872-03-22  
   last obs. used      2014-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60447  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 13:51:20  

Additional Information
 Earth MOID = 1.05973 AU 
 T_jup = 3.473 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.14 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 32
diameter diameter 41.73 km 1.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 32
rotation period rot_per 7.8055 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Stanzel, R.; Schober, H.J. (1980) Astron. Astrophys. Suppl. Ser. 39, 3-5.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2009) Minor Planet Bul. 36, 172-176.]
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.2240   0.017 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 32
B-V BV .859 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=3.42, mean=8.57, max.=13.72) deg.
U-B UB .433 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=3.42, mean=8.57, max.=13.72) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

118 Peitho          Discovered 1872-Mar-15 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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